Electroencephalograph DX-ExpertTM belongs
to a new generation of devices outstanding the currently used ones
both by their technical and operational features and novel schematic
solutions, which dramatically widen the EEG application area in
the clinical and ambulance practice.

The device distinguishes itself by utilization
of digital telemetry and the possibility of continuous daily registration,
which makes it possible to use DX-ExpertTM not only in functional
diagnosis departments, but also in neurological, neurosurgical and
resuscitation departments. EEG is recorded by means of digital wireless
transmission of electrophysiological signal through radio frequency
communication channels. Absence of wires connecting the patient
to the recording device (PC) greatly facilitates the electroencephalographic
control both during scientific investigations and clinical practice.

Electroencephalograph DX-ExpertTM is much
less sensitive to pulse and systematic interference than any stationary
device, and its small dimensions make a new quality of routine investigations
and monitoring feasible.

Advantages of DX-ExpertTM compared to traditional
systems are:

The device ensures complete class III CF electric safety of
investigation due to battery power supply and radio telemetry.

Improved quality of EEG recording, which facilitates analysis
and increases the quality of diagnosis.

Insensitivity to a number of physical and physiological artifacts
facilitates the staff's work and increases the throughput of the
entire system.

Routine EEG investigation can be extended to desired scope
at any time.

Build-up of the system capabilities can take place along the
following lines:

installing arbitrary number of additional consoles (PC),
ensuring 'real-time' EEG observation;
" increasing the number of transmitting devices (EEG amplifiers)
connected to one recording device in order to increase the system
throughput and ensure recording of EEG of up to three patients
on one PC simultaneously;
" correcting the EEG amplifier characteristics on the User's
demand by reprogramming the built-in processor;
" increasing the telemetry range of action by mounting additional
antenna-feeder devices.

Substantial advantage of the device is its built-in
processor, which makes it possible to digitize, pre-filter, decimate,
compress and encode the signal in the amplifier itself. This technical
solution has insured implementation of electroencephalographic signal
transmission over a radio channel without any distortion and interference,
including 50 Hz hum, which is completely absent in electroencephalogram
under any conditions of recording. The minimum radiated power in
the radio band and low power consumption of the EEG amplifier ensure
24-hour registration of electroencephalogram without replacing the
set of batteries. High input impedance of the amplifier makes it
possible to use standard electroencephalographic gel for daily registration
of EEG, reducing at the same time the number of inevitable physiological
artifacts.